Method for preparing ruthenium catalyst for producing cycloolefin and method and apparatus for producing cycloolefin

摘要

A method for preparing a ruthenium catalyst, including a step of reducing a ruthenium catalyst precursor by holding the ruthenium catalyst precursor in an aqueous solution containing a metal salt at a temperature within the range of more than 180° C. and 220° C. or less and a hydrogen partial pressure within the range of 0.6 MPa or more and 5 MPa or less. A method for producing a cycloolefin, including a step of preparing a ruthenium catalyst by the method including a step of reducing a ruthenium catalyst precursor in an aqueous solution containing a metal salt by holding the ruthenium catalyst precursor at a temperature within the range of more than 180° C. and 220° C. or less and a hydrogen partial pressure within the range of 0.6 MPa or more and 5 MPa or less, and a step of partially hydrogenating a monocyclic aromatic hydrocarbon by use of the ruthenium catalyst obtained.

主权项

1. A method for preparing a ruthenium catalyst comprising:
forming a precipitate comprising Ru(OH)3 and Zn(OH)2 from ruthenium chloride and zinc chloride; mixing the precipitate with ZrO2 to obtain a ruthenium catalyst precursor containing ZrO2 as a dispersant, wherein the ruthenium catalyst precursor comprises zinc in an amount from 0.1 to 50 parts by mass relative to 100 parts by mass of ruthenium; and reducing the ruthenium catalyst precursor in an aqueous solution of zinc sulfate at a temperature within a range of 180° C. to 220° C. and at a hydrogen partial pressure within a range of 1 MPa to 3.5 MPa.